Cita APA

Rosero Bixby, L., & Sierra Ramos, R. (2007). X-ray screening seems to reduce gastric cancer mortality by half in a community-controlled trial in Costa Rica.

Chicago Style Citation

Rosero Bixby, Luis, i Rafaela Sierra Ramos. X-ray Screening Seems to Reduce Gastric Cancer Mortality By Half in a Community-controlled Trial in Costa Rica. 2007.

Cita MLA

Rosero Bixby, Luis, i Rafaela Sierra Ramos. X-ray Screening Seems to Reduce Gastric Cancer Mortality By Half in a Community-controlled Trial in Costa Rica. 2007.